Singling preventer



Oct. 30, 1934. J vlENS 1,978,657

SINGLING PREVENTER Filed June 8, 1953 2 Sheets-Sheet 1 F1 a. 2. if 8 Aenry avian:

INVENTOR TTORNEY Oct. 30, 1934- H. J. VIENS SINGLING PREVENTER FiledJune 8, 1933 2 Sheets-Sheet 2 A czry zns INVENTOR TTORNEY Patented Oct.30, 1934 UNITED STATES r PATENT OFFICE Application June 8, 1933, SerialNo. 674,854

2 Claims.

This invention relates to improvements in, singling preventers. Moreespecially it has to do with a simple automatic device whereby when oneof several moving yarns breaks the others are almost simultaneously cut,thereby preventing the running of less than the desired number of yarns.

The invention is particularly applicable to twisting machines of thetextile industry but may be employed on any machine where two or moreyarns, such as cotton, wool, acetate, rawsilk or rayon, are being movedsimultaneously and where it is desired to prevent the continued movementof any yarn should one of the yarns break. The improvements areillustrated in connection with a spooler by which two yarns are drawnfrom separate spools and wound upon a single spool, a procedure commonlyknown as doubling. It is highly important to prevent what is calledsingling, that is the continued winding of one yarn after the other hasbroken. It is to the prevention of such singling that the invention isdirected. I

The principal object is to provide a knife and means for normallyholding the knife away from the moving yarns but which upon the breakingof one yarn is adapted to effect movement of the knife so that it willpromptly cut the unbroken yarn. It is a feature of the present improvements that the means employed to prevent singling can be used with yarndrawn from either fixed or rotating spools.

The particular application of the invention shown in the accompanyingdrawings is purely illustrative and it is intended that the patent shallcover by suitable expression in the appended olaims whatever features ofpatentable novelty exist in the invention as a whole.

In the drawings:

Figure 1 is a side elevation of a spooler having associated therewith asingling preventer embodying the present improvements;

Figure 2 is a plan view of the same;

Figure 3 is an enlarged side view of the device itself, showing theportion of its parts when the yarns are all running; and

Figure 4 is a similar view showing the positions assumed by the partswhen one yarn breaks and the knife is ready to cut the remaining yarns.

Referring more particularly to the drawings, the machine shown forpurposes of illustration is a spooler having a rail 1 upon which aseries of spindles 2 are mounted on each of which is a spool 3. Thesespools are rotated by suitable means and draw yarn from a correspondingseries of delivery spools. In this particular case, each receiving spool3 draws yarn from two delivery spools 4 and 5. As shown these spools arefixed and the yarn on each is so wound as to provide a surface S(indicated by the dot and dash lines) corresponding to the surface of atruncated cone, so but it is to be understood that the yarn could bedrawn from rotatable spools if desired.

The yarn 6 from one spool and the yarn 7 from the other spool passesthrough guides 8 and 9 and around tensioning means 10 and 11 through esa guide 12 and thence under a fixed post 13. The latter is mounted on asuitable support 14 on which is also secured a shaft 15. On this isrotatably mounted a knife 16 and a pair of feeler levers 1'7 and 18.Each lever is preferably a light :10 but stiff wire wound once about theshaft 15, with a short arm 17a, (18a) on one side thereof and a long arm17b (18b) on the other side, the latter arm having a porcelain guide 170(180) at its end,

When the yarns are moving normally each passes through its respectiveguides 17c, 18c and thence over another guide 19 to the receiving spool3. The relative positions of the post 13 and the guide 19 are such thatthe yarns in passing from one to the other through the guides 17c, 18chold the latter upward and thus cause the short arms 17a, 18a to be helddownward from the knife 16. This knife is so mounted that its own weighttends to swing its cutting edge 16a. downward away from the post 13 andthe yarns passing thereunder. Its normal position is determined by somesuitable stop 20 on the support 14.

If one of the yarns breaks, as for example yarn 6, as shown in Figure 4,its feeler lever 1'7 immed'iately rotates about the shaft 15. Theleverage of the weight of the long arm 17?) and porcelain guide 17c actsto swing the short arm 1711 up against the knife with an appreciableforce and r thus causes the knife to rotate and bring its cut-- tingedge into contact with the post 13. The unbroken yarn 7 is thus severedand singling is prevented.

If more than two yarns are being drawn from the delivery spools, therewould be provided a feeler lever for each yarn, and each would beeffective upon the breakage of its particular yarn to move the knife tocutting position and thus effect the prompt severance of all theremaining yarns.

The device is exceedingly simple and yet highly effective, due primarilyto the fact that it operates to positively cut the unbroken yarnsimmediately upon the breakage of one of them.

I claim as my invention:

1. Means for stopping the movement of two or more moving yarnscomprising a fixed post past which the yarns move; a movable knifepivotally mounted beyond said post in the direction of travel of saidyarn, normally positioned clear of said post and yarns but adapted to beswung toward said post to bring its cutting edge into engagement withthe yarns so that further travel of the yarn would tend to enhance saidengagement; and means engaging the moving yarn and positioned therebyfor moving said knife toward said post upon the breaking of a yarnwhereby the remainder of the yarns are severed.

2. Apparatus of the character described comprising a support; a postfixed thereon past which two or more yarns are arranged to move; a shaftfixed on said support beyond said post in the direction of travel ofsaid yarn; a knife rotatably mounted on said shaft tending to swing awayfrom said yarn and post but adapted to be swung toward said post toclamp the yarn between the cutting edge and the post; a feeler lever foreach yarn rotatably mounted on said shaft having an arm engaging itsrespective yarn and having another arm arranged to engage said knife;said lever being so disposed that upon the breaking of its respectiveyarn, the lever swings into engagement with said knife and rotates ittoward the said post whereby its cutting edge severs the unbroken yarns.

HENRY J. VIENS.

